Question

These days, I tries to create a hiden WebBrowser control in my program, and Using the IViewObject interface draw to my custom DC.

The result is fine, I got All the content I want, but the Draw speed is unacceptable, especially some complex web pages which contains Flash objects, Each Draw to DC cost more than 100 ms. So the flash object I drew is not smooth.

Is there a fast way to draw the control to my a specific DC?

my code sinpet is like this:

//hCompDc is a CompatibleDC which select a CompatibleBitmap.
RECTL imageRect = {0, 0, nWidth, nHeight};
pHtmlDocument2->QueryInterface(IID_IViewObject, (void **)&pViewObject);
pViewObject->Draw(DVASPECT_CONTENT, -1, NULL, NULL, NULL, hCompDc, NULL, &imageRect, NULL, 0);

Thank you for reading this question.

Waiting for your answers~

Answer 1

There is no other way to do this. None of the components you’re using–IE, Flash, etc–were designed to be used this way. If draw time is an issue, you have to do it on a separate thread and synchronize.